Marine seismic node acquisition station

Abstract

The invention relates to the technical field of marine seismic exploration, and discloses a marine seismic node acquisition station. The marine seismic node acquisition station comprises an acquisition station body and a connecting end cover, the acquisition station body comprises an outer shell, a circuit bin and two battery modules, the two battery modules are symmetrically arranged on the two sides of the circuit bin, the connecting end cover is arranged at the open end of the outer shell, and the weight of the connecting end cover is larger than that of the end, away from the connecting end cover, of the acquisition station body. And a three-component detector in circuit connection with the battery module is arranged in the circuit bin. The marine seismic node acquisition station provided by the invention ensures the stability in the putting process, the three-component geophone is directly fixed on the connecting end cover with larger weight, and when the node acquisition station is put into the seabed, the connecting end cover is easier to contact with the seabed, so that the coupling effect of the whole body and the seabed is enhanced; meanwhile, the loss of seismic signals transmitted from the outer shell to the three-part detector is avoided, the intensity of the collected signals is increased, and deep high-precision exploration is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of marine seismic exploration, and particularly to a marine seismic node acquisition station. Background Art

[0002] The technical requirements for marine oil and gas exploration are high and the operation difficulty is great. There is an urgent need to develop broadband high-resolution seismic acquisition and processing technologies to improve the resolution and signal-to-noise ratio of seismic profiles, so as to improve the reliability of target evaluation and reduce the drilling risk. In order to improve the exploration accuracy, the acquisition instrument needs to develop towards higher coverage density and larger number of channels. OBN (Ocean Bottom Node) is a multi-component seismograph located on the seabed that can independently acquire and record seismic signals. It has the characteristics of wide azimuth, high coverage, high construction efficiency, multi-component recording, and strong feasibility in complex terrain, and is the mainstream method for current marine seismic acquisition.

[0003] Three orthogonal omnidirectional moving coil geophones are installed inside the seabed node to respectively acquire the seismic shear wave signals in the X and Y directions and the seismic longitudinal wave signal in the Z direction. The centroid distribution of the seabed node, the installation position of the geophone in the seabed node, and the coupling between the seabed node and the seabed will all affect the reception of the seabed seismic signals by the geophone.

[0004] The existing seabed node design adopts a circular double cylinder or a square single cylinder, and the battery is installed on one side of the node. This structure will cause uneven weight distribution of the entire node, and it will not land stably during the node deployment process, thus affecting the attitude of the node when it is on the seabed. Moreover, the arrangement method of the node reduces the coupling effect of the omnidirectional geophone, resulting in weak seismic signals collected and unable to achieve deep high-precision exploration. Summary of the Invention

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present invention provides a marine seismic node acquisition station.

[0006] The present invention provides a marine seismic node acquisition station, which includes an acquisition station body and a connection end cover. The acquisition station body includes an outer shell, a circuit chamber and two battery modules arranged inside the outer shell. The two battery modules are symmetrically arranged on both sides of the circuit chamber. One end of the outer shell is open, and the connection end cover is arranged at the open end of the outer shell and is connected to the ends of the circuit chamber and the two battery modules. Among them, the weight of the connection end cover is greater than the weight of the end of the acquisition station body far from the connection end cover. A three-component geophone connected to the battery module by a circuit is arranged in the circuit chamber, and the three-component geophone is connected to the connection end cover.

[0007] Optionally, an opening communicating with the interior of the outer housing is provided on the connection end cover, and the opening allows a circuit to pass through.

[0008] Optionally, the opening has opposite first and second ends. A piezoelectric detector is provided at the first end of the opening, and the first end of the opening is sealed by the piezoelectric detector. A piston is detachably connected to the second end of the opening.

[0009] Optionally, a plurality of mounting grooves for mounting zinc rods are provided on the connection end cover.

[0010] Optionally, a sealing groove into which an end of the circuit compartment can be inserted is provided on the connection end cover.

[0011] Optionally, a plurality of threaded holes are provided on an end face of the sealing groove, and the plurality of threaded holes correspond one-to-one with a plurality of through holes on the three-component detector.

[0012] Optionally, a sealing platform into which an end of the battery module can be inserted is provided on the connection end cover, and the two sealing platforms are symmetrically arranged on both sides of the sealing groove.

[0013] Optionally, positioning lugs are provided on the outside of the sealing groove. A first positioning hole is provided on the positioning lugs, and a second positioning hole is provided on the circuit compartment, and it is configured that:

[0014] When the circuit compartment rotates to a position where the first positioning hole and the second positioning hole are opposite to each other, the plurality of threaded holes correspond one-to-one with the plurality of through holes.

[0015] Optionally, three accommodation grooves are provided inside the outer housing, and the three accommodation grooves are respectively used for mounting the circuit compartment and two battery modules, and adjacent two of the accommodation grooves are separated by rib ribs.

[0016] Optionally, the outer housing includes a first half shell and a second half shell that are snap-fitted together, and the rib ribs of the first half shell and the second half shell are connected by bolts.

[0017] Optionally, limiting bosses are respectively provided at both ends of the accommodation groove.

[0018] Optionally, an operation part is provided on the outer housing.

[0019] Optionally, the operation part is provided on the connection end cover, and an avoidance hole through which the operation part can be exposed is provided on the outer housing.

[0020] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0021] In the marine seismic node acquisition station provided by the present invention, two battery modules are respectively located on both sides of the circuit compartment, which makes the overall weight distribution of the node acquisition station uniform without tilting to one side, ensuring the stability during the deployment of the node acquisition station and avoiding affecting the attitude of the node acquisition station on the seabed. The three-component geophone is directly fixed on the relatively heavier connection end cover. When the node acquisition station is put into the seabed, since the weight of the connection end cover is greater than the weight of the end of the acquisition station body away from the connection end cover, the connection end cover is more likely to contact the seabed, enhancing the overall coupling effect with the seabed. At the same time, it avoids the loss of seismic signals when transmitted from the outer casing to the three-component geophone, increases the intensity of the acquired signals, and ensures high-precision deep exploration. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings herein are incorporated into and constitute a part of this specification, showing embodiments consistent with the present invention and, together with the specification, are used to explain the principles of the present invention.

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a side view of the marine seismic node acquisition station according to the embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the marine seismic node acquisition station according to the embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of the internal structure of the acquisition station body according to the embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the outer structure of the acquisition station body according to the embodiment of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the battery compartment and part of the battery module connected to the connection end cover according to a part of the embodiment of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the connection end cover according to the embodiment of the present invention.

[0030] DESCRIPTION OF THE REFERENCE NUMERALS

[0031] 1. Acquisition station body; 11. Outer housing; 111. Accommodation groove; 112. Ridge rib; 113. First half shell; 114. Second half shell; 115. Limit boss; 116. Operation part; 117. Wedge foot; 12. Circuit bin; 121. Three-component geophone; 122. Circuit housing; 123. Circuit module; 124. Circuit end cover; 13. Battery module; 131. Battery housing; 132. Battery pack; 133. Battery end cover;

[0032] 2. Connection end cover; 21. Opening; 22. Piezoelectric geophone; 23. Zinc rod; 24. Sealing groove; 25. Threaded hole; 26. Sealing platform; 27. Positioning earpiece; 28. Installation groove. Detailed implementation manner

[0033] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the solution of the present invention will be further described below. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0034] Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0035] Combined with Figures 1 to 6 As shown, the marine seismic node acquisition station provided by the embodiment of the present invention includes an acquisition station body 1 and a connection end cover 2. The acquisition station body 1 includes an outer housing 11, a circuit bin 12 and two battery modules 13 arranged inside the outer housing 11. The two battery modules 13 are symmetrically arranged on both sides of the circuit bin 12. Among them, the weights of the two battery modules 13 are the same, so that the weights of the acquisition station body 1 on both sides of the circuit bin 12 are the same, ensuring that the center of gravity of the acquisition station body 1 in this direction is centered. In this design method, there are two battery modules 13, which have a large capacity and can ensure the power supply demand. The power supply methods of the two battery modules 13 are not limited and will be specifically described below.

[0036] One end of the outer housing 11 is open, and the other end is closed. The circuit compartment 12 and the two battery modules 13 can be inserted into the interior of the outer housing 11 through the open end of the outer housing 11 to achieve the installation of the circuit compartment 12 and the two battery modules 13. The connection end cap 2 is provided at the open end of the outer housing 11, and the connection end cap 2 is connected to the ends of the circuit compartment 12 and the two battery modules 13. In this design, after the connection end cap 2 is connected to the circuit compartment 12 and the two battery modules 13, the connected circuit compartment 12 and the two battery modules 13 are inserted into the interior of the outer housing 11, and then the connection end cap 2 is hermetically connected to the open end of the outer housing 11 to increase the convenience of disassembly and assembly. Alternatively, the outer housing 11 can be provided in a split manner, which will be specifically described below.

[0037] The weight of the connection end cap 2 of the present application is greater than the weight of the end of the acquisition station body 1 away from the connection end cap 2, so that when the marine seismic node acquisition station is put into the seabed, the probability that the relatively heavier connection end cap 2 part of the marine seismic node acquisition station faces downward increases, making the connection end cap 2 easier to contact the seabed. Among them, the connection end cap 2 is made of a metal material, so that the weight of the connection end cap 2 is large enough. Then, when the marine seismic node acquisition station is put into the 3000m seabed, it can be coupled with the seabed under the action of gravity, which is convenient for the three-component geophone 121 installed on the connection end cap 2 to better receive seismic signals.

[0038] As Figure 5 shown, a three-component geophone 121 connected to the battery module 13 by a circuit is provided in the circuit compartment 12. In this design, the two battery modules 13 can supply power to the three-component geophone 121 to meet the use requirements of the three-component geophone 121. In addition, the battery module 13 is also connected to other components that need power supply to serve as an energy basis. The three-component geophone 121 is connected to the connection end cap 2, and the connection method between the three-component geophone 121 and the connection end cap 2 is not limited. For example, it can be a bolt connection, a snap connection, a plug connection, etc., which can be designed according to actual needs. Since in the marine seismic node acquisition station in this design, the overall mass distribution of the marine seismic node acquisition station is uniform, and at the same time the center of gravity is biased towards the connection end cap 2 and the three-component geophone 121 connected to the connection end cap 2, the connection end cap 2 can contact the seabed. The method of directly connecting the three-component geophone 121 to the connection end cap 2 can enable seismic signals to be directly transmitted from the connection end cap 2 to the three-component geophone 121, avoiding the loss of seismic signals and increasing the signal acquisition intensity.

[0039] In addition, a circuit module 123 should also be provided inside the battery compartment. The circuit module 123 is connected to the three-component geophone 121 by a circuit. As the core component of the marine seismic node acquisition station, the circuit module 123 includes multiple circuit boards for signal transmission and component control. This type of circuit module 123 is a conventional technology in this field and is not the protection point of this application. Therefore, the specific usage method and working principle are not described in detail herein.

[0040] Among them, the three-component geophone 121 is a special geophone used in multi-wave exploration. Different from the single-component conventional seismic geophone, each geophone is equipped with three mutually perpendicular sensors to record the three components of the particle vibration velocity vector for simultaneously recording longitudinal waves, transverse waves, and converted waves. The three-component geophone 121 is a conventional technology in this field. Therefore, the structure and working principle are not described in detail herein.

[0041] In the marine seismic node acquisition station provided by the present invention, the two battery modules 13 are respectively located on both sides of the circuit compartment 12, which makes the overall weight distribution of the node acquisition station uniform without bias to one side, ensuring the stability during the deployment of the marine seismic node acquisition station and avoiding affecting the attitude of the node acquisition station on the seabed. The three-component geophone 121 is directly fixed on the relatively heavy connection end cover 2. When the node acquisition station is put into the seabed, since the weight of the connection end cover 2 is greater than the weight of the end of the acquisition station body 1 away from the connection end cover 2, the connection end cover 2 is more likely to contact the seabed, enhancing the overall coupling effect with the seabed. At the same time, it avoids the loss of seismic signals when transmitted from the outer housing 11 to the three-component geophone, increases the intensity of the acquired signals, and ensures deep high-precision exploration.

[0042] In some embodiments, the two battery modules 13 are connected in series to provide electrical energy for each component of the marine seismic node acquisition station (including the three-component geophone 121 and the piezoelectric geophone 22 described below). In this design, the electrical energy storage capacity can be effectively increased to ensure sufficient power supply for each component to meet the long-term power consumption requirements of the marine seismic node acquisition station.

[0043] In other embodiments, the two battery modules 13 are used independently. That is, one battery module 13 is connected to multiple components to be powered to provide electrical energy for each component to be powered (including the three-component geophone 121 and the piezoelectric geophone 22 described below), and the other battery module 13 is also connected to multiple components to be powered to provide electrical energy for each component to be powered (including the three-component geophone 121 and the piezoelectric geophone 22 described below).

[0044] In this design method, during the use of the marine seismic node acquisition station, one of the battery modules 13 supplies power to meet the power supply requirements of each component (including the three-component geophone 121 and the piezoelectric geophone 22 described below). When the battery module 13 fails or runs out of power, the battery module 13 stops working. At this time, the other battery module 13 operates to avoid affecting the use of the marine seismic node acquisition station. In this design method, the two battery modules 13 are used as backups for each other to avoid the situation where the marine seismic node acquisition station cannot be used due to battery failure. Among them, the method of using the battery module 13 alone and the method of the other battery module 13 providing electrical energy to each component when one of the battery modules 13 fails or runs out of power are conventional technologies and will not be described in detail here.

[0045] Combined with Figure 2 and Figure 5 As shown, the circuit bin 12 of the present application includes a circuit housing 122 with both ends open. One of the open ends of the circuit housing 122 is connected to the connection end cap 2, and the connection method can be inner surface sealed connection or outer surface sealed connection, which can be selected according to actual needs. The other open end of the circuit housing 122 can be inner surface sealed or outer surface sealed. Preferably, the other open end of the circuit housing 122 is inner surface sealed, specifically sealed by the circuit end cap 124, that is, the circuit end cap 124 is inserted into this open end of the circuit housing 122. Among them, the circuit end cap 124 can adopt a plug-and-play connection method or a threaded connection method, which are not restrictive, in order to increase the convenience of disassembly and assembly.

[0046] In some embodiments, the circuit housing 122 adopts a cylindrical structure, and the circuit end cap 124 adopts a plug-and-play connection method to be inner surface sealed connected to the end of the circuit housing 122. Specifically, the side of the circuit end cap 124 is provided with a plug post, the diameter of the plug post should be smaller than the diameter of the circuit end cap 124, and the outer diameter of the plug post should match the inner diameter of the circuit housing 122. During installation, the plug post of the circuit end cap 124 needs to be inserted into the circuit housing 122 until the circuit end cap 124 covers the end of the circuit housing 122. Preferably, the outer diameter of the circuit end cap 124 matches the outer diameter of the circuit housing 122 to prevent the circuit end cap 124 from protruding out of the circuit housing 122, making the overall structure of the circuit bin 12 more compact and reducing space occupation.

[0047] In some other embodiments, the circuit housing 122 adopts a cylindrical structure, and the circuit end cap 124 is hermetically connected to the inner surface of the end of the circuit housing 122 by a threaded connection. Specifically, the side surface of the circuit end cap 124 is provided with a stud, and an external thread is provided on the outer periphery of the stud. The inner wall of the circuit housing 122 is provided with an internal thread matching the external thread. Among them, the diameter of the stud should be smaller than the diameter of the circuit end cap 124. During installation, the stud of the circuit end cap 124 needs to be screwed into the circuit housing 122 until the circuit end cap 124 covers the end of the circuit housing 122. Preferably, the outer diameter of the circuit end cap 124 matches the outer diameter of the circuit housing 122, so as to prevent the circuit end cap 124 from protruding out of the circuit housing 122, making the overall structure of the circuit chamber 12 more compact and reducing space occupation.

[0048] An accommodation cavity is formed among the circuit housing 122, the connection end cap 2 and the circuit end cap 124. The circuit module 123 and the three-component geophone 121 are both arranged in the accommodation cavity of the circuit housing 122. At the same time, the three-component geophone 121 is arranged on one side of the circuit module 123 close to the open end, so that the three-component geophone 121 can pass through the open end and be directly connected to the connection end cap 2. In this way, when the marine seismic node acquisition station enters the seabed, due to the gravity factor, the three-component geophone 121 can be better coupled with the seabed. The shape of the circuit housing 122 is not limited. In order to ensure the pressure resistance and sealing in the high-pressure environment at a sea depth of 3000m, the circuit housing 122 preferably adopts a cylindrical structure.

[0049] Among them, the circuit housing 122 is made of a metal material, so that it has a relatively large pressure resistance. According to the sizes of the three-component geophone 121 and the circuit module 123, the inner diameter of the circuit housing 122 is preferably 90mm. And since the circuit housing 122 needs to withstand a pressure of 30 MPa underwater, therefore, the wall thickness of the circuit housing 122 is preferably 6mm. And through experimental verification, the circuit housing 122 with this thickness can completely withstand a water pressure of 30 MPa to meet the use requirements.

[0050] Combined with Figure 2 and Figure 5As shown, the battery module 13 of the present application includes a battery housing 131 and a battery pack 132 disposed within the battery housing 131. Both ends of the battery housing 131 are open. One of the open ends of the battery housing 131 is connected to the connection end cap 2, and the connection method can be inner surface sealing connection or outer surface sealing connection, which can be selected according to actual requirements. The other open end of the battery housing 131 can be subjected to inner surface sealing connection or outer surface sealing. Preferably, the other open end of the battery housing 131 is subjected to inner surface sealing connection, specifically sealed by the battery end cap 133, that is, the battery end cap 133 is inserted into this open end of the battery housing 131. Among them, the battery end cap 133 can adopt a plug-and-play connection method or a threaded connection method, and these are not restrictive, in order to increase the convenience of disassembly and assembly.

[0051] In some embodiments, the battery housing 131 adopts a cylindrical structure, and the battery end cap 133 adopts a plug-and-play connection method to perform inner surface sealing connection with the end of the battery housing 131. Specifically, the side surface of the battery end cap 133 is provided with a plug post, the diameter of the plug post should be smaller than the diameter of the battery end cap 133, and the outer diameter of the plug post should match the inner diameter of the battery housing 131. During installation, the plug post of the battery end cap 133 needs to be inserted into the battery housing 131 until the battery end cap 133 covers the end of the battery housing 131. Preferably, the outer diameter of the battery end cap 133 matches the outer diameter of the battery housing 131 to prevent the battery end cap 133 from protruding out of the battery housing 131, making the overall structure of the battery compartment more compact and reducing space occupancy.

[0052] In other embodiments, the battery housing 131 adopts a cylindrical structure, and the battery end cap 133 adopts a threaded connection method to perform inner surface sealing connection with the end of the battery housing 131. Specifically, the side surface of the battery end cap 133 is provided with a plug post, and an external thread is provided on the outer periphery of the plug post. The inner wall of the battery housing 131 is provided with an internal thread that matches the external thread. Among them, the diameter of the plug post should be smaller than the diameter of the battery end cap 133. During installation, the plug post of the battery end cap 133 needs to be screwed into the battery housing 131 until the battery end cap 133 covers the end of the battery housing 131. Preferably, the outer diameter of the battery end cap 133 matches the outer diameter of the battery housing 131 to prevent the battery end cap 133 from protruding out of the battery housing 131, making the overall structure of the battery compartment more compact and reducing space occupancy.

[0053] An accommodation cavity is formed among the battery housing 131, the connection end cap 2 and the battery end cap 133. The battery pack 132 is arranged in the accommodation cavity. The battery pack 132 should be in contact with the inner wall of the battery housing 131 or be limited by a limiting member inside the battery housing 131 to avoid the phenomenon that the battery pack 132 shakes in the battery housing 131, thereby avoiding damage to the battery pack 132. Preferably, in order to increase the pressure resistance, the battery housing 131 is preferably of a cylindrical structure.

[0054] As a feasible implementation manner, the battery housing 131 is preferably a cylinder made of titanium alloy. The battery pack 132 is formed by combining 21700 battery cells. Thus, the inner diameter of the battery housing 131 is determined to be 101 mm. And since the battery housing 131 needs to withstand a pressure of 30 MPa underwater, therefore, the wall thickness of the battery housing 131 is preferably 6 mm. And through experimental verification, the battery housing 131 with this thickness can completely withstand a water pressure of 30 MPa to meet the use requirements.

[0055] The connection end cap 2 is provided with an opening 21 communicating with the inside of the outer housing 11. The opening 21 can be used for a circuit to pass through, so as to facilitate the shuttling of the connection circuits between various components to meet the wiring requirements. Specifically, the opening 21 extends along the axial direction of the connection end cap 2 to facilitate the opening of the opening 21. The side of the opening 21 should be the same as the inside of the outer housing 11 to facilitate the circuit connection between components.

[0056] The opening 21 has opposite first and second ends. Figure 6 Taking the shown direction as an example, the first end of the opening 21 is the top end of the opening 21, and the second end of the opening 21 is the bottom end of the opening 21. A piezoelectric detector 22 is provided at the first end of the opening 21, and the first end of the opening 21 is sealed by the piezoelectric detector 22. Specifically, the diameter of the first end of the opening 21 is increased for installing the piezoelectric detector 22, and the piezoelectric detector 22 seals the position with a smaller diameter of the opening 21. Among them, the manner in which the piezoelectric detector 22 seals the opening 21 is not limited. For example, the housing of the piezoelectric detector 22 can be provided with a columnar structure to block the opening 21 through the columnar structure. Another example is that the housing of the piezoelectric detector 22 can be provided with a columnar structure, and an external thread is provided on the outer periphery of the columnar structure, and an internal thread matching the external thread is provided on the inner wall of the opening 21. The opening 21 is sealed by screwing the columnar structure at the end of the opening 21. These are not restrictive.

[0057] A piston is detachably connected to the second end of the opening 21, that is, the piston can block the second end of the opening 21, or the piston can be removed from the second end of the opening 21, so that the opening 21 is in a state of being connected to the outside. Among them, the opening 21 is connected to the inside of the outer housing 11. The opening 21 is provided not only for routing wires but also for the connection between the outer housing 11 and the outside air, so as to balance the pressure inside the outer housing 11 during the component assembly process. And when all components are assembled, the second end of the opening 21 is sealed by the piston, so that the marine seismic node acquisition station is in a closed state.

[0058] Among them, the piezoelectric geophone 22 is mainly used to collect the seismic longitudinal wave pressure transmitted in seawater, convert the seismic longitudinal wave pressure signal into an electrical signal, and transmit it to the circuit module 123. The piezoelectric geophone 22 is a conventional technology in this field, and its structure and working principle are not described in detail here.

[0059] Combined Figure 5 and Figure 6 As shown, a plurality of mounting grooves 28 for mounting zinc rods 23 are provided on the connection end cover 2. The connection method between the zinc rod 23 and the mounting groove 28 is not limited. For example, the zinc rod 23 can be inserted or threadedly connected to the mounting groove 28, and can be designed according to actual needs.

[0060] In this application, by providing the zinc rod 23 on the connection end cover 2, the sacrificial anode can be used to protect the marine seismic node acquisition station, avoid seawater corrosion of the marine seismic node acquisition station, and increase the service life of the marine seismic node acquisition station. Among them, the zinc alloy sacrificial anode is a conventional technology in this field, and its working principle is not described in detail here.

[0061] Further optimized, in order to increase the protection effect, there can be a plurality of mounting grooves 28, and the plurality of mounting grooves 28 are evenly distributed. Each mounting groove 28 is provided with a zinc rod 23. Correspondingly, there are also a plurality of zinc rods 23, and the plurality of zinc rods 23 are evenly distributed.

[0062] In some embodiments, as Figure 6 shown, a sealing groove 24 for inserting the end of the circuit bin 12 is provided on the connection end cover 2. During installation, the end of the circuit bin 12 is inserted into the sealing groove 24, specifically, the end of the circuit housing 122 is inserted into the sealing groove 24 to achieve the sealing of the outer surface of the end of the circuit bin 12. In this design, the connection end cover 2 is inserted and connected to the circuit bin 12, thereby increasing the convenience of disassembly and connection of the circuit bin 12.

[0063] Among them, the sealing groove 24 can be formed by the side opening 21 of the connection end cover 2, or a ring plate can be provided on the side of the connection end cover 2, and the inside of the ring plate forms the sealing groove 24. It can be seen that the formation method of the sealing groove 24 is not limited and can be designed according to actual needs.

[0064] The end face of the sealing groove 24 is provided with a plurality of threaded holes 25. Specifically, threaded holes 25 are provided on the side surface of the connection end cover 2, and the plurality of threaded holes 25 are evenly distributed in the sealing groove 24. The plurality of threaded holes 25 correspond one-to-one with the plurality of through holes on the three-component geophone 121, that is, the number of threaded holes 25 is the same as that of the through holes and the arrangement manner is the same, so that each through hole can correspond to a threaded hole 25. Preferably, the number of threaded holes 25 can be three, and the three threaded holes 25 are evenly distributed to ensure the stability of the connection. Of course, it can be understood that in order to further increase the connection strength, the number of threaded holes 25 can also be greater than three, and these are not restrictive.

[0065] In this design method, when the end of the circuit chamber 12 is inserted into the sealing groove 24, by rotating the circuit chamber 12 or presetting the insertion angle of the circuit chamber 12, the through holes on the inserted circuit chamber 12 can be made to correspond one-to-one with the threaded holes 25 on the connection end cover 2. Then, bolts are passed through the through holes and screwed into the threaded holes 25 to realize the connection between the three-component geophone 121 and the connection end cover 2, so as to ensure the lossless transmission of submarine seismic signals, ensure the connection strength, and at the same time increase the convenience of disassembly and assembly.

[0066] In some embodiments, the connection end cover 2 is provided with a sealing platform 26 for the end of the battery module 13 to be inserted. Among them, the sealing platform 26 can be an annular plate structure provided on the side surface of the connection end plate, or the sealing platform 26 can also be a platform structure. When the sealing platform 26 is a platform structure, a hole structure for the circuit to pass through needs to be opened in the middle of the sealing platform 26.

[0067] During installation, the end of the battery module 13 is sleeved on the outer periphery of the sealing platform 26. Specifically, the end of the battery housing 131 of the battery module 13 is sleeved on the outer periphery of the sealing platform 26 to realize the inner surface sealing of the battery module 13. In this design method, the connection end cover 2 is inserted and connected with the battery module 13, thereby increasing the convenience of disassembly and connection of the battery module 13. The two sealing platforms 26 are symmetrically arranged on both sides of the sealing groove 24, so that the two battery modules 13 are symmetrically arranged on both sides of the circuit chamber 12.

[0068] In this design method, the battery modules 13 are located on both sides, the circuit chamber 12 is located in the middle, and the connection end cover 2 is inserted and connected with the battery module 13, thereby increasing the convenience of disassembly and connection of the battery module 13, and further increasing the disassembly and connection efficiency of the battery module 13.

[0069] Such as Figure 6As shown in the figure, positioning lugs 27 are provided on the outer side of the sealing groove 24. First positioning holes are provided on the positioning lugs 27, and second positioning holes are provided on the circuit chamber 12. When the circuit chamber 12 rotates to a position where the first positioning hole and the second positioning hole are opposite to each other, a plurality of threaded holes 25 correspond to a plurality of through holes one by one. In this design method, by providing the positioning lugs 27, the position of the circuit chamber 12 can be initially positioned, so as to facilitate the subsequent connection of the three-component detector 121 and the connection end cover 2.

[0070] In some embodiments, an annular plate is provided on the side surface of the connection end cover 2, and a sealing groove 24 is formed inside the annular plate. At this time, the positioning lugs 27 are provided on the outer side of the annular plate, and the positioning lugs 27 can extend along the axial direction perpendicular to the circuit chamber 12. At this time, lugs need to be provided on the outer periphery of the circuit housing 122 of the circuit chamber 12, and the second positioning holes are opened on the lugs.

[0071] In some embodiments, an annular plate is provided on the side surface of the connection end cover 2, and a sealing groove 24 is formed inside the annular plate. At this time, the positioning lugs 27 are provided on the outer side of the annular plate, and the positioning lugs 27 can extend along the axial direction of the circuit chamber 12. At this time, only threaded holes need to be provided on the outer periphery of the circuit housing 122 of the circuit chamber 12.

[0072] During installation, the three-component detector 121 is installed in the circuit housing 122 of the circuit chamber 12, and the end of the circuit housing 122 is inserted into the sealing groove 24 so that the first positioning hole on the positioning lug 27 is opposite to the second positioning hole on the circuit housing 122. By passing a positioning pin or a positioning screw (i.e., the first positioning hole can be a through hole or a threaded hole), the position of the circuit housing 122 and the connection end cover 2 can be restricted. At this time, a plurality of through holes on the three-component detector 121 correspond to a plurality of threaded holes 25 on the connection end cover 2 one by one. Then, bolts are passed through the corresponding through holes and screwed into the threaded holes 25, which increases the positioning accuracy and installation convenience. Further optimized, in order to increase the positioning accuracy, the positioning lugs 27 can be two symmetrically arranged ones.

[0073] As Figure 3 As shown in the figure, three accommodation grooves 111 are opened inside the outer housing 11. The three accommodation grooves 111 are respectively used for installing the circuit chamber 12 and two battery modules 13, and adjacent two accommodation grooves 111 are separated by a rib 112. Specifically, the three accommodation grooves 111 extend along the axial direction of the outer housing 11, and the three accommodation grooves 111 are arranged in sequence along the width direction of the outer housing 11.

[0074] This design makes the three receiving slots 111 independent of each other, and further makes the circuit compartment 12 and the battery module 13 in the three receiving slots 111 independent of each other, avoiding mutual influence between the components. At the same time, the circuit compartment 12 and the battery module 13 can be limited by the ridge 112 and the inner wall of the outer shell 11, avoiding the position of the circuit compartment 12 and the battery module 13 from moving. Among them, the shape, structure and size of the three receiving slots 111 can be designed according to the circuit compartment 12 and the battery module 13. Specifically, the shape, structure and size of the receiving slots 111 on both sides are the same, and the receiving slots 111 on both sides are adapted to the shape, structure and size of the battery module 13, and the receiving slot 111 in the middle is adapted to the shape, structure and size of the circuit compartment 12, so as to ensure the installation effect of the circuit compartment 12 and the battery module 13, and at the same time ensure the compactness of the structure of the marine seismic node acquisition station.

[0075] Preferably, in order to increase the pressure-bearing effect, the shells of the circuit compartment 12 and the battery module 13 both adopt a cylindrical structure. The marine seismic node acquisition station of this design adopts an independent three-cylinder structure with high pressure resistance. The battery module 13 and the circuit compartment 12 are respectively installed in different accommodating grooves 111, which makes it very convenient to disassemble and install a certain part in the marine seismic node acquisition station without affecting other parts.

[0076] Under this design, the connecting end cover 2 is the single largest mass part in the marine seismic node acquisition station, and the battery module 13 is evenly distributed on both sides of the marine seismic node acquisition station, so that the center of gravity of the entire marine seismic node acquisition station is biased toward the connecting end cover 2. Therefore, when the marine seismic node acquisition station is placed 3,000 meters below the seabed, the connecting end cover 2 is more easily coupled with the seabed, so that the three-component detector 121 installed on the connecting end cover 2 can better receive seismic signals.

[0077] Continue to refer to Figure 3 A limiting boss 115 is provided at both ends of the accommodating groove 111. The limiting boss 115 and the ridge 112 together play the role of limiting the battery module 13 or the circuit compartment 12 to ensure the positioning effect of the battery module 13 and the circuit compartment 12 and the stability during use.

[0078] like Figure 1As shown, the outer housing 11 includes a first half-shell 113 and a second half-shell 114 that are snap-fitted together. At the position of the rib 112 of the first half-shell 113 and the second half-shell 114, they are connected by bolts. The outer housing 11 designed in this way adopts a split structure. During installation, after the circuit compartment 12 and the two battery modules 13 are connected to the connection end cover 2, the circuit compartment 12 and the two battery modules 13 can be placed in the first half-shell 113, and then the second half-shell 114 is snap-fitted, and thus the installation and placement of the circuit compartment 12 and the two battery modules 13 can be completed. Moreover, the first half-shell 113 and the second half-shell 114 can be connected by bolts, which increases the convenience of disassembly and assembly of the outer housing 11 and the firmness of the connection. In addition, the first half-shell 113 and the second half-shell 114 can also be connected first, then the circuit compartment 12 and the two battery modules 13 are connected to the connection end cover 2, and finally, after the connected circuit compartment 12 and the two battery modules 13 are inserted into the outer housing 11, the outer housing 11 is connected to the connection end cover 2.

[0079] Among them, both the first half-shell 113 and the second half-shell 114 adopt a non-metallic structure, and the shapes of the first half-shell 113 and the second half-shell 114 can be in a half-shell shape. It can be understood that the first half-shell 113 and the second half-shell 114 can also adopt other structural forms and can be designed according to actual needs.

[0080] Specifically, the first half-shell 113 and the second half-shell 114 are respectively provided with three half-grooves. The three half-grooves all extend along the axial direction of the outer housing 11, and the three half-grooves are arranged in sequence along the width direction of the outer housing 11. When the first half-shell 113 and the second half-shell 114 are snap-fitted, the three half-grooves on the first half-shell 113 and the second half-shell 114 correspond one by one, so that the two corresponding half-grooves form a receiving groove 111 to receive the corresponding circuit compartment 12 or battery module 13.

[0081] The first half-shell 113 and the second half-shell 114 are respectively provided with two ridges. One ridge is provided between two adjacent half-grooves. When the first half-shell 113 and the second half-shell 114 are snap-fitted, the ridges on the first half-shell 113 and the second half-shell 114 correspond one by one, so that the two corresponding ridges form a rib 112. The bolt passes through one of the ridges and is connected to the other ridge, thereby realizing the connection between the first half-shell 113 and the second half-shell 114. Among them, the position where the bolt passes through has sufficient hardness to avoid affecting the structural strength at the connection position of the first half-shell 113 and the second half-shell 114, and thus ensure the service life of the outer housing 11.

[0082] An operation part 116 is provided on the outer housing 11 of the present application. In this design, it is convenient for the staff to manually or operate the marine seismic node acquisition station with the aid of external equipment, increasing the convenience of operation.

[0083] Further optimized, the operation part 116 is arranged on the connection end cover 2. Specifically, the operation part 116 is arranged on the outer side of the connection end cover 2, and the outer shell 11 is provided with an avoidance hole for the operation part 116 to expose. The operation part 116 can be a handle or a lifting ring, etc. Among them, a threaded hole 25 is arranged on the outer side of the connection end cover 2, and the handle or the lifting ring is provided with a through hole, and the bolt passes through the through hole and is screwed on the connection end cover 2 to realize the connection between the handle or the lifting ring and the connection end cover 2, which is convenient for disassembly and assembly and has a firm connection.

[0084] Wedge feet 117 can be arranged on the outer periphery of the outer shell 11. The outer shell 11 can not only effectively protect the circuit compartment 12 and the two battery modules 13, but also be better fixed on the seabed through the wedge feet 117 at the bottom. After the marine seismic node acquisition station is placed on the seabed, the marine seismic node acquisition station can independently perform detection work as a single node.

[0085] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0086] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. An ocean seismic node acquisition station, characterized in that, it includes an acquisition station body (1) and a connection end cover (2). The acquisition station body (1) includes an outer housing (11), a circuit compartment (12) and two battery modules (13) arranged inside the outer housing (11). The two battery modules (13) are symmetrically arranged on both sides of the circuit compartment (12). One end of the outer housing (11) is open, and the connection end cover (2) is arranged at the open end of the outer housing (11), and the connection end cover (2) is connected to the ends of the circuit compartment (12) and the two battery modules (13). Among them, the weight of the connection end cover (2) is greater than the weight of the end of the acquisition station body (1) away from the connection end cover (2). A three-component geophone (121) connected to the battery module (13) by a circuit is arranged in the circuit compartment (12), and the three-component geophone (121) is connected to the connection end cover (2).

2. The ocean seismic node acquisition station according to claim 1, characterized in that, an opening (21) communicating with the inside of the outer housing (11) is provided on the connection end cover (2), and the opening (21) allows a circuit to pass through.

3. The ocean seismic node acquisition station according to claim 2, characterized in that, the opening (21) has an opposite first end and second end. A piezoelectric geophone (22) is provided at the first end of the opening (21), and the first end of the opening (21) is sealed by the piezoelectric geophone (22). A piston is detachably connected to the second end of the opening (21).

4. The ocean seismic node acquisition station according to claim 1, characterized in that, a plurality of mounting grooves (28) for mounting zinc rods (23) are provided on the connection end cover (2).

5. The ocean seismic node acquisition station according to claim 1, characterized in that, a sealing groove (24) into which the end of the circuit compartment (12) can be inserted is provided on the connection end cover (2).

6. The ocean seismic node acquisition station according to claim 5, characterized in that, a plurality of threaded holes (25) are provided on the end face of the sealing groove (24), and the plurality of threaded holes (25) correspond one by one to a plurality of through holes on the three-component geophone (121).

7. The ocean seismic node acquisition station according to claim 5, characterized in that, a sealing platform (26) into which the end of the battery module (13) can be inserted is provided on the connection end cover (2), and the two sealing platforms (26) are symmetrically arranged on both sides of the sealing groove (24).

8. The ocean seismic node acquisition station according to claim 6, characterized in that, a positioning ear piece (27) is provided on the outside of the sealing groove (24), and a first positioning hole is provided on the positioning ear piece (27). A second positioning hole is provided on the circuit compartment (12), and it is configured that: when the circuit compartment (12) rotates to a position where the first positioning hole and the second positioning hole are opposite, the plurality of threaded holes (25) correspond one by one to the plurality of through holes.

9. The ocean seismic node acquisition station according to claim 1, It is characterized in that Three accommodation grooves (111) are formed inside the outer shell (11). The three accommodation grooves (111) are respectively used for installing the circuit compartment (12) and the two battery modules (13), and adjacent two of the accommodation grooves (111) are separated by rib ribs (112).

10. The marine seismic node acquisition station according to claim 9, It is characterized in that The outer shell (11) includes a first half shell (113) and a second half shell (114) that are buckled with each other. The rib ribs (112) of the first half shell (113) and the second half shell (114) are connected by bolts at their positions.

11. The marine seismic node acquisition station according to claim 9, It is characterized in that Limit bosses (115) are respectively arranged at both ends of the accommodation groove (111).

12. The marine seismic node acquisition station according to claim 1, It is characterized in that An operation part (116) is arranged on the outer shell (11).

13. The marine seismic node acquisition station according to claim 2, It is characterized in that The operation part (116) is arranged on the connection end cover (2), and an avoidance hole for the operation part (116) to expose is arranged on the outer shell (11).

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